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Letters Patent No. 100,784, dated llafrch 15, 1870; aazteflated February 28, 1870.

' IMPROVEMNT IN cmcnnAR-SAW MILL The Schedulefreferred to in these Letters Patent and making partof the saine.

To all whom 'it 'ma-y concern :V

Be it known that we, J ONATHAX'MILLS and AL- BERT G. WALDo, of the city and count-y of Milwaukee, and State 'of Wisconsin, have invented a new and useful Improvement in Double Circular-Saw Mills;`

andwe do hereby declare that the following is a full, l clear, and exact description' thereof; which-will enable 'those skilledin Vthe al1; to make and use the same, referenccbeingr had tothe accompanying drawing forming partof this speciiicatiomin which- Figure 1 'is a side viewof our invention; y,

Figure 2flis an endrsectional view; l

,Figure 3 isa side view of` a hollow sleeve, `in which runs theupper saw-mandrel; and o Figure 4 isan end view ofthe hollow sleeve.

Similar letters of reference in each off'the figures indicate corresponding parts. o.,

The nature of our invention consists in arranging the upper saw in a double mill so` as to overhang, and also to be raised and lowered and-set with screws, .so as to be adjnstedin an easy and correct manner:

A is the sawfflame. y

B, the main saw.

`C, `the upper saw. u

. D D, an iron stand to support the upper saw C.

Eis a hollow sleeve for the mandrel of saw C to run m: l Y

F is av movable frame, which can be moved up and down at will, holding the sleeve E in order to regulate the saw C, as it is worn out.

` 4roinrln'nn Mints AND ,ALBERT e. WAL'Do, or MInwAUKEE, wisconsin.-

G G are screws, with which to raise and lower thev saw C as may 'be required.

H H` are set-screws through bnrsonsleeve E, 'to

give a lateral'motion to the upper saw C, in order t keepit` in line wththe lower saw B.

I lare also set-screws, for the purpose of setting the saw with more or less rake, as circumstances may require. l n

' K, pulley on upper saw-mandrel.

L, mandrel for saw G running on sleeve E. M M, boxes on sleeve E in which mandrel L runs N, mandrel of lower saw B. g What we claim as our invention, and desire to secure by Letters Patent,gis-

Saw G, stand D, sleeve E, frame F, screws G, H, and I, and mandrel AL, in combination with saw B, substantially as described. JNO. MILLS.

J. B. SMITH, J C. POLLARD. 

